Numerical Simulation of Dynamic Process under Low Pressure Casting Based on Two Phase Flow

Shan Guang Liu; Fu Yang Cao; Xin Yi Zhao; Yan Dong Jia; Zhi Liang Ning; Jian Fei Sun

doi:10.4028/www.scientific.net/AMM.727-728.358

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 727-728Numerical Simulation of Dynamic Process under Low...

Numerical Simulation of Dynamic Process under Low Pressure Casting Based on Two Phase Flow

Abstract:

It has been proved that the mold filling under low pressure casting can be described by the second order nonlinear differential equations characterized by damping oscillations. To obtain higher accuracy of the velocity field, the mold filling process with damping oscillations should be considered. A computational model taking the liquid level droping in the crucible into account based on two phase flow for filling process of damping oscillations is presented in this paper. Hydraulic simulation with the particle image velocimetry was adopted to verify the numerical simulation result. It is proved that the nemuerical simulation results used the presented model perfecly match with the particle image velocimetry results. Liquid level droping in crucible is the main reason for damping oscillations in mold filling. Velocity oscilations can be eliminated when the melt flow across a sudden expansion section. The detailed flow field based on the presented model can provide guidance to optimize the process parameters.

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Periodical:

Applied Mechanics and Materials (Volumes 727-728)

Pages:

358-361

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.727-728.358

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Online since:

January 2015

Authors:

Shan Guang Liu, Fu Yang Cao, Xin Yi Zhao, Yan Dong Jia, Zhi Liang Ning, Jian Fei Sun*

Keywords:

Low Pressure Casting, Mold Filling Simultiaon, PIV Test, Two Phase Flow, VOF Model

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